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Spreading dynamics of drop impacts. (English) Zbl 1284.76021

Summary: We present an experimental study of drop impact on a solid surface in the spreading regime with no splashing. Using the space-time-resolved Fourier transform profilometry technique, we can follow the evolution of the drop shape during the impact. We show that a self-similar dynamical regime drives the drop spreading until the growth of a viscous boundary layer from the substrate selects a residual minimal film thickness. Finally, we discuss the interplay between capillary and viscous effects in the spreading dynamics, which suggests a pertinent impact parameter.

MSC:

76-05 Experimental work for problems pertaining to fluid mechanics
76T10 Liquid-gas two-phase flows, bubbly flows
76D45 Capillarity (surface tension) for incompressible viscous fluids
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